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Furnace Installation Cost Calculator

This free furnace installation cost calculator gives you a planning estimate for installing a new furnace where none exists, such as in a home addition, a conversion or new construction. Choose the furnace type, home size and efficiency, then set the ductwork, gas supply, vent length and electrical work. You will see a cost breakdown with Budget, Standard and Premium project levels in about two minutes.

Free Planning Estimate Detailed Cost Breakdown Budget / Standard / Premium

Estimate My Furnace Installation Cost

OMNIESTIMATE · HVAC · FURNACE

Price a new furnace installation

Price a new gas, propane, electric or oil furnace with ducts, venting and gas or electrical work in one breakdown.

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Planning estimate only. This calculator provides a planning estimate only. It is not a quote, bid or guaranteed price. Actual contractor pricing may vary based on location, site conditions, equipment choice, labor market and project complexity.

Request quotes from licensed HVAC contractors

Use the estimate above as your planning budget, then request quotes using the form below the calculator. The form appears after a calculation succeeds and fills in your estimate automatically.

Lead form — to be connected. Fluent Form ID unverified. Visible fields when connected: full_name, email, phone, zip_code, project_notes, contact_consent.

Calculator Introduction

Answer a few quick questions about your furnace installation and the calculator estimates your cost in four steps: Location & Furnace Type, Equipment & Efficiency, Ducts, Gas & Electrical and Labor Market & Timing. A ZIP code is required so we can match your request with local licensed professionals. It does not change the price. Only the questions that matter for your project are shown, and every setting has a sensible default, so you can get a first estimate in under a minute and then fine-tune.

How to Read Your Results

Estimated Project Budget

Your result shows an Estimated Project Budget, which is the Standard estimate, together with a typical range from Budget to Premium.

Budget

Budget assumes a basic furnace line and lean labor.

Standard — plan around this

Standard assumes a mid-grade furnace, quality duct and venting materials and a licensed installer at typical rates. This is the best number to plan around.

Premium

Premium assumes a premium furnace, higher-grade parts and premium service.

Below the headline

Below the headline number you will see a category breakdown, a line-item table for all three project levels, and a tip based on your selections.

Live updates

Results update automatically if you change an input after calculating.

What Is Included in Each Cost Category

The breakdown only shows categories that apply to your project, so you will not see empty $0 rows.

Materials

The furnace, propane kit when selected, vent and flue parts, condensate drain, gas connector and gas line parts, oil line, circuit and breaker, duct materials and connections, furnace stand, Manual J load calculation, thermostat and any upgrades selected.

Labor

Installer time for the furnace, ductwork, venting, gas line and electrical work, startup and combustion check.

Removal & Disposal

Haul-away of packaging and install debris. There is no old furnace to remove, so no removal line appears.

Permit / Inspection

An optional allowance only. Real fees are set by your city or county.

Additional Costs

An electrical panel upgrade allowance, when selected, and an urgent or after-hours service premium, when selected.

Not included

The propane or oil tank, air conditioning, drywall and finish work.

How Much Does Furnace Installation Cost?

Furnace installation typically costs about $8,945 at the Standard level for a new 80,000 BTU gas furnace with partial new ductwork in a 2,000 to 2,500 square foot home, with a Budget to Premium range of about $5,655 to $14,400. A new install costs more than a replacement because it adds ductwork, a vent, a gas or electrical supply and a load calculation.

Planning figures are for a 2,000 to 2,500 square foot, one-story home with an 80,000 BTU furnace, standard 80% AFUE efficiency, a programmable thermostat, a basement or utility-room install, a 20-foot vent run, partial new ductwork, a gas line nearby, an electrical circuit that is already in place for gas and a new circuit for electric, a permit allowance, debris haul-away and an average labor market.

Furnace	Budget	Standard	Premium
Natural gas furnace	$5,655	$8,945	$14,400
Propane (LP) furnace	$5,790	$9,165	$14,765
Electric furnace	$4,895	$7,750	$12,530
Oil furnace	$6,795	$10,730	$17,090

Change any input and the numbers update, because the calculator prices the furnace, ducts, vent, gas or electrical supply, labor and permit separately.

How This Furnace Installation Calculator Works

1. Choose the furnace type

Pick natural gas, propane, electric or oil.

2. Choose size and equipment

Select your home size, the number of stories, the efficiency level, the thermostat and the furnace location.

3. Describe ducts, gas, vent and electrical work

Tell us how much new ductwork is needed, how the gas supply reaches the furnace, how long the vent run is and what electrical work is needed.

4. Set your labor market and timing

Choose the market that matches your area and whether the work is urgent.

5. See three project levels

The calculator then prices equipment and labor at planning rates and shows three project levels. Your ZIP code is used to match your request with local HVAC contractors. It does not change the price.

What Affects Furnace Installation Costs?

Furnace type

Natural gas is most common. Propane uses the same unit with a conversion kit for LP gas. Electric needs no gas or venting, which lowers its cost. Oil needs an oil line, a filter and a chimney or flue connection, which makes it the most expensive of the four. See also the HVAC Installation Cost Calculator.

Home size and number of stories

Calculator maps home size to a furnace size of 40,000 to 120,000 BTU. For a gas furnace, Standard runs from about $7,460 for 1,000 to 1,500 square feet to about $10,120 for 2,500 to 3,500 square feet. More stories mean longer duct runs and more climbing, so a three-story home raises the Standard estimate from about $8,945 to about $9,625.

Ductwork

A furnace needs ducts to deliver the heat. Priced by home size; choices: existing ducts, partial new ducts, or full new duct system.

Ductwork	What it includes	Standard gas furnace estimate
Existing ducts	Seal and connect	$6,230
Partial new ducts	Add returns and extend runs	$8,945
Full new duct system	Supply, returns and registers	$13,980

Efficiency level

Standard 80% is lowest-cost. High-efficiency 92 to 96% two-stage condensing raises Standard gas estimate from about $8,945 to about $10,495. Higher-efficiency units need PVC vent pipes and a condensate drain, added automatically.

Gas supply

If nearby, cost is a connection. A short new branch raises Standard gas estimate to about $9,815, and a longer new run from the meter raises it to about $10,985. Calculator does not size the meter, so a gas fitter confirms it can deliver enough gas. See also the Gas Line Installation Cost Calculator.

Vent length

Vent carries exhaust outdoors, priced by run length. A 40-foot metal flue run raises Standard gas estimate from about $8,945 to about $9,660. A condensing furnace uses PVC pipe, which costs less per foot.

Electrical supply

A furnace needs power for blower and controls; an electric furnace needs a much larger circuit. If a circuit is already in place, cost is a connection. A new circuit raises Standard gas estimate to about $9,790, and a panel upgrade (allowance for a licensed electrician) raises it to about $10,745.

Install location

Basement or utility room is the easy case. A closet or alcove takes more time, a crawl space more, and an attic the most. A furnace in an attic also needs a platform and a safe way to reach it.

Optional upgrades

A variable-speed blower, a media filter cabinet, a whole-home humidifier, a carbon monoxide alarm, a surge protector and a two-zone damper system each add parts and labor. Upgrades appear only when they apply to the furnace type chosen.

Permits and debris

A new furnace almost always needs a permit and inspection. Calculator includes a permit allowance of about $325 at Standard by default, and adds haul-away of packaging and debris. Removing the permit lowers Standard gas estimate from about $8,945 to about $8,620. The allowance is a planning placeholder, not the municipal fee.

Urgency

Urgent and after-hours calls carry a premium. Calculator adds 15% to labor for work within about 48 hours and 40% for emergencies. At the highest-cost market setting or with an emergency call, Standard gas estimate rises from about $8,945 to about $10,500.

Budget vs Standard vs Premium Furnace Installation

Three levels reflect real differences, not a simple multiplier:

Budget

A basic furnace line and a leaner labor rate.

Standard

A mid-grade furnace, quality duct and venting materials and a licensed installer at typical rates.

Premium

A premium furnace, higher-grade parts, more thorough commissioning and premium service rates.

Use Standard as the main planning number, and the Budget-to-Premium range to see how much choices can swing the result.

Installation vs Replacement vs Heat Pump

If you already have a furnace, replacing it is usually less expensive than a new installation, because ducts, vent and gas line are already there. Use the furnace replacement calculator in that case. A heat pump can heat and cool with one system, which can make sense in a milder climate where you also need air conditioning. Compare options before deciding.

Regional Pricing Differences

HVAC labor rates and permit practices vary across the country. Rather than guess from ZIP code, the calculator lets you choose a labor market, from lower-cost areas to the highest-cost metro areas, and applies it to labor. Equipment and materials are not adjusted.

DIY vs Hiring a Licensed HVAC Contractor

Installing a new furnace is not a DIY project. It involves sizing the furnace, designing and sealing ducts, gas connections, venting, electrical wiring and combustion testing. A mistake can cause a gas leak or carbon monoxide exposure. Most areas require a licensed contractor, a permit and an inspection.

Questions to Ask HVAC Contractors

Will you perform a Manual J load calculation and a duct design?
Which brand and model are in the quote, and what is the AFUE rating?
How will the furnace vent, and where will the vent exit and the drain run?
Does the quote include the gas line, electrical work, permit and inspection?
Will you test the combustion, check for gas leaks and install a CO alarm?
What is the warranty on parts, labor and the heat exchanger?

How to Avoid Unexpected Furnace Installation Costs

Plan the duct layout early. Moving ducts after framing is finished costs far more.
Check the gas meter and the electrical panel before you pick the furnace.
Decide where the furnace, vent and drain go with the contractor.
Ask for a written scope that lists the equipment, ducts, vent, gas work and what is not included.
Plan for finish work. Drywall, framing and paint are separate costs.

Ready for a Real Quote?

Use the estimate above as your planning budget, then request quotes from licensed HVAC contractors using the form below the calculator. Floor plans, photos of the furnace location and the electrical panel, and the location of the gas meter help contractors quote more accurately.

Quick Answers About Furnace Installation Costs

How much does furnace installation cost?

Furnace installation commonly costs about $8,945 at the Standard level for a new 80,000 BTU gas furnace with partial new ductwork in a 2,000 to 2,500 square foot home, and about $5,655 to $14,400 across the Budget to Premium range.

What is a Manual J load calculation?

A Manual J load calculation is a standard method that estimates how much heating and cooling a home needs, based on its size, insulation, windows, climate and orientation. It is used to size a furnace correctly.

What is the difference between furnace installation and replacement?

Installation puts a furnace in a home that has none, so it adds ductwork, a vent and a gas or electrical supply. Replacement swaps an old furnace for a new one and reuses the existing connections, so it usually costs less.

How much does ductwork add to a new furnace installation?

In this calculator, a full new duct system raises the Standard gas furnace estimate for a 2,000 to 2,500 square foot home from about $6,230 with existing ducts to about $13,980.

What is the biggest cost driver in furnace installation?

Ductwork is the biggest driver, followed by the furnace efficiency, the home size and the gas, vent and electrical work.

Furnace Installation FAQs

How much does furnace installation cost?

In this calculator, a Standard estimate for installing a new 80,000 BTU gas furnace in a 2,000 to 2,500 square foot home is about $8,945, with a Budget to Premium range of roughly $5,655 to $14,400. The estimate includes partial new ductwork, a 20-foot vent run, a Manual J load calculation and a permit allowance.

How much does it cost to install a furnace in a house without one?

A house with no furnace usually needs ductwork, a vent, a gas or electric supply and a load calculation. A Standard estimate for a gas furnace with partial new ducts is about $8,945, and with a full new duct system it is about $13,980. Using existing ducts lowers it to about $6,230.

How much does gas line work add to a furnace installation?

If the gas line is nearby, the cost is a connection. Extending the gas line raises the Standard gas furnace estimate from about $8,945 to about $9,815, and a longer new gas line run from the meter raises it to about $10,985. Your gas fitter confirms the pipe size and the meter capacity.

What is the difference between furnace installation and replacement?

Installation puts a furnace in a home that does not have one, so it adds ductwork, a gas or electrical supply, a vent and a load calculation. Replacement swaps an old furnace for a new one and reuses the existing connections. That is why installation usually costs more than replacement.

Does the furnace installation estimate include electrical work?

The default for a gas furnace assumes a circuit is already in place. A new circuit raises the Standard estimate by about $845 to about $9,790, and a panel upgrade allowance raises it to about $10,745. For an electric furnace, the estimate includes a new circuit by default. Have an electrician confirm what your home needs.

Is a high-efficiency furnace worth it for a new installation?

A 90% or higher furnace uses less fuel but costs more and needs PVC vent pipes and a condensate drain. In this calculator, high efficiency raises the Standard gas furnace estimate from about $8,945 to about $10,495. The savings depend on your climate, your fuel price and how much the furnace runs.

Do I need a permit to install a furnace?

New furnaces almost always need a permit and an inspection. The calculator includes an allowance of about $325 at the Standard level, and removing it lowers the estimate to about $8,620. Real fees are set by your city or county, so ask your contractor or building department.

Does the estimate include a propane or oil tank?

The propane or oil tank, its delivery and its setup are not included in the estimate. Many suppliers lease propane tanks, so ask what they charge before you plan the budget.